Sterilizer.



W. B. UNDERWOOD.

( STERILIZER. APPLICATION FILED SEPT. 1, I916- 3 SHEETSSHEET I.

Patented May 28, 1918.

, lhmvmmunr W. B. UNDERWOOD.

STERILIZER.

. APPLICATION FILED'SEPT. 1, 1915. 1,267,716. Patented May 28, 1918.

' l2 3 SHEETS-SHEET 2.

WEEDEN B. UNDERWOOI), OF ROCHESTER, NEW YORK, ASSIGNOR T0 WILMOT CASTLE COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION.

STERILIZER.

Specification of Letters Patent.

Patented May 28, 1918.

Application filed September 1, 1916. Serial No. 118,056.

To all whom it may concern Be itlmown that I, lVnnonN B. UNDER- wooo, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Sterilizers, of which the following is a speciflcation.

The present invention relates to sterilizers and more particularly to the type in which a tray is movable vertically within the sterilizing chamber for the purpose of bringing the contents to the top of the chamber, an object of this invention being to pro vide an improved construction operated by power so that utensils and other large articles may be readily handled in the sterilizer. A further object of the invention is to provide an improved construction in which the tray is guided in its vertical movement so that no binding can take place. A. still further object of the invention is to provide a construction which will require but a single fluid pressure actuating device so located that none of the parts connecting with the tray operate within the sterilizing chamber.

To these and other ends, the invention consists of parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings Figure 1 is a vertical section through a sterilizer constructed in accordance with th present invention; 7

Fig. 2 is a sectional view on the line (0ez, Fig. 1;

Fig. 3 is a rear view of the sterilizer shown in Fig. 1;

Fig. 1 is a sectional view through the fluid pressureactuating means; and

Fig. 5 is a section on the line bb, Fig. 3.

Referring more particularly to the drawings, 1 indicates a sterilizing casing formed with a sterilizing chamber 2. This casing has a supporting frame 3 which holds the chamber 2 in an elevated position. A cover 4 closes the upper end of the sterilizing chamber and preferably has a depending flange 5 fitting in the chamber. Through this flange 5, a rod 6 extends so as to project from opposite sides of the flange. This rod serves to support the tray 7 which has supporting members 8 at opposite ends formed of wire or other material which preferably may be bent or flexed laterally, the upper ends of said supports having hooks 9 which engage the rod 6. Preferably the hooks also engage the inner faces of the opposite ends of the pressed-up portion of the cover so that the tray supports are held toward each other at their upper ends and frictionally engage the cover to hold the tray against swinging freely.

The ends 10 of the rod 6 rest in seats 11 formed in the upper ends of guide rods 12 which are guided at 13 in bearings projecting from opposite sides of the casing 1, and which, when the cover is in closed position, project below the bottom of the sterilizing chamber. Both of these rods are moved by a single actuating means so that they will move simultaneously at the same rate of speed and thereby prevent any binding action between the tray and the side walls of the sterilizing chamber.

The actuating means in this instance, em-

bodies a cylinder 14 mounted vertically at, i

the rear of the supporting frame symmetri cally with relation to the opposite sides of the frame. This cylinder has a piston or actuating element 15, mounted therein and carrying a piston rod 16 operating through the upper end of the cylinder. On the upper end of the piston rod, a cross head 17 is arranged, to the end of which the ends of two flexible connections 18 are secured. the other ends of the connections being secured at 19 to the lower ends of the guide rods 12. Beween their ends. the flexible ends 18 may each pass over two pulleys 20 and 21, one supported below the cross-head, and the other supported in proximity to a guide rod 12 so that when the piston 15 is elevated, the flexible chain, or connection 18 will be pulled to operate on the lower ends of the guide rods and move the latter upwardly.

Fluid is admitted to and exhausted from the cylinder 14 by way of a piping 22 entering the bottom of the cylinder, said pi ing connecting with a supply pipe 23 by a connection 24 which leads into a valve 25 of any suitable construction. The valve 25 is controlled by a foot piece 26 and a foot piece 27, the foot piece 26 admitting the fluid to the piping 22 and the foot piece 27 ermitting an exhaust from the piping 22 by way of a piping 28. From the top of the cylinder 14, 2. piping 29 extends and connects with the exhaust piping 28 sothat any fluid which passes to the opposite side of the pin ten 15 will be conducted to the exhaust pipe. A pipe 29 leads from the supply pipe 23 to the bottom of the sterilizer, and a steam eX- haust 30 leads from the rear wall of the chamber 2. any suitable heating means may be employed for the sterilizer.

in operation, to open the sterilizer, the

foot piece 26 is depressed, causing the liuid actuated member to raise the cover and tray so that the latter is accessible, while the lowerinn' ot the tray and cover is ettected by depressing the foot piece 2?.

A sterilizer constructed in accordance with this invention employs but one fluid actuated cylinder and piston which is connected to the tray and cover at opposite sides of said parts to prevent binding action, while at the same time none of the parts of said operating mechanism operate Within the sterilizingchamber.

What I claim as my invention and desire to secure by Letters Patent is 1. A sterilizer comprising a sterilizing chamber, a tray movable therein, and a single fluid pressure actuated member, arranged exteriorly of said chamber and having connection with opposite sides of the tray.

2. A sterilizer comprising a sterilizing chamber, a tray movable therein, a fluid pressure actuated member arranged exteriorlyof said chamber, and at least two flexible connections between said fluid pres sure actuated member and the tray.

8. A sterilizer comprising a sterilizing chamber, a cover therefor, a tray suspended from the cover within the chamber, guide rods secured to the cover, and a single fluid actuated member connected to both rods and arranged enteriorly of said chamber.

i-i sterilizer comprising a sterilizing chamber, a cover therefor, a tray suspended from the cover within the chamber, guide rods secured to the tra v, a fluid actuated member arranged exteriorly of said chamber, and flexible connections between the guide rods and the fluid actuated member.

erm-e 5. A. sterilizer comprising a sterilizing chamber, a. cover therefor, a tray suspended from the cover within the chamber, guide rods secured to the cover, an actuating member arranged exteriorly'of said chamber, and flexible connections between the actuating member and the guide rods.

6.. A sterilizer comprising a sterilizing chamber, a cover therefor, a tray suspended from the cover, two rods connected to the cover at opposite sides thereof and guided on the sterilizer casing, a verticall y movable actuating member arranged at the rear of the sterilizer casing, and two flexible connections between vertically movable actuating members and the lower ends of the guide rods. 7

7. A sterilizer comprising a sterilizing chamber, a cover therefor, rods guided on the sterilizer casing, supporting the cover at their upper ends and having their lower ends, when the cover is closed, projecting below the bottom of the sterilizing chamher, a cylinder arranged at the rear of the sterilizing chamber, a piston movable vertically in said cylinder, a cross head carried by said piston, two flexible connections eX- tending from said cross head to the lower ends of the rods, and pulleys about which said connections pass.

8. A. sterilizer comprising a sterilizing chamber, a cover therefor, a tray suspended from the cover, and means for raising the tray and the cover simultaneously, said means including a single cylinder arranged ezteriorly of the sterilizing chamber, and operating connections between the cylinder and the tray, arranged to maintain the tray in a horizontal position during its movement.

9. A sterilizer comprising a sterilizing chamber, a cover therefor, a tray suspended from the cover, a pair of vertically guided rods supporting the cover, a single cylinder arranged ezteriorly of thesterilizing chamber, and a flexible connection from the cylinder to each of said rods.

WEEDEN BUNDERWOOD.

oopies of this patent be obtained for five each, by addressing the flominissioner of Patents, 

